Helicopter hub magnetorheological shimmy damper

A technology of magneto-rheological and shimmy dampers, which is applied in the direction of rotorcraft, aircraft, motor vehicles, etc., can solve the problems of lack of adaptability, oil leakage of shimmy dampers, etc., and achieve strong adaptability, easy installation, and avoid power transmission Effects of wiring problems

Inactive Publication Date: 2007-07-11
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

These shock absorbers have the problems of oil leakage, characteristics affected by the environment such as frequency, temperat

Method used

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  • Helicopter hub magnetorheological shimmy damper

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Example Embodiment

[0009] Figure 1 is a schematic diagram of the structure of a helicopter hub magnetorheological damper. Describe the specific structure and implementation steps of the present invention according to the drawings:

[0010] The specific structure of the present invention is that the excitation coil 6 is installed outside the damper, and the magnetorheological fluid 9 is injected into the inner cavity of the liquid reservoir through the two liquid injection holes 7 of the liquid reservoir. The cavity wall, the upper end cover and the armature 3 of the semicircular liquid reservoir 8 constitute the magnetorheological fluid return channel 2. The reciprocating rotating piston 5 is connected to the rotating shaft 4 mounted on the armature 3 and reciprocating together, and the magnetorheological fluid 9 flows back and forth in the magnetorheological fluid return channel 2 along with the reciprocating rotating piston 5. After the excitation coil 6 is energized, a magnetic field is generated...

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Abstract

The invention relates to a hub magnetic flow variable shimmy damper of helicopter, wherein it comprises magnetic flow variable liquid 9, electromagnet 1, armature 3, and excitation coil 6 for generating magnetic field, rotation axle 4, excitation coil rotation piston 5, and semi-round liquid container 8. The magnetic flow variable liquid is poured into the chamber of liquid container; the rotation piston and the rotation axle are connected to rotate together; the magnetic flow variable liquid moves repeated in the liquid reflux channel along with the piston; via changing the input current, the output damping torque of shimmy damper can be changed. The invention can semi-automatically control ground resonance and air resonance of helicopter.

Description

1. Technical field [0001] The rotor hub magneto-rheological damper of the invention belongs to the intelligent material structure and the rotor hub damper of the helicopter. 2. Background technology [0002] Helicopter hub damper is a damper that is installed on the rotor hub of a helicopter and controls vibration and stability in the direction of vibration in the plane of rotation. It controls vibration and stability by consuming the vibration energy of the rotor in the direction of vibration It is a major technical measure to eliminate or control the "ground resonance" and "air resonance" of the helicopter. The vast majority of helicopters in the world are equipped with hub dampers. [0003] At present, the hub dampers used at home and abroad mainly include hydraulic dampers, viscoelastic dampers, and a small amount of friction dampers. These shock absorbers have the problems of oil leakage, and the characteristics are affected by the environment such as frequency, tempe...

Claims

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Application Information

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IPC IPC(8): B64C27/32F16F9/53
Inventor 夏品奇王唯
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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